package com.ev.config;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * Description 线程池配置 执行方式（在方法上加上@Async("asyncServiceExecutor")）
 **/
@Configuration
@EnableAsync
public class ExecutorConfig {
    /**
     * log日志
     */
    private static final Logger logger = LoggerFactory.getLogger(ExecutorConfig.class);

//    @Value("${async.executor.thread.core_pool_size}")
//    private int corePoolSize;
//    @Value("${async.executor.thread.max_pool_size}")
//    private int maxPoolSize;
//    @Value("${async.executor.thread.queue_capacity}")
//    private int queueCapacity;
//    @Value("${async.executor.thread.name_prefix}")
//    private String namePrefix;
//
//    @Bean(name = "asyncServiceExecutor")
//    public Executor asyncServiceExecutor() {
//        logger.info("=======================start asyncServiceExecutor");
//        ThreadPoolTaskExecutor executor = new VisiableThreadPoolTaskExecutor();
//        //配置核心线程数
//        executor.setCorePoolSize(corePoolSize);
//        //配置最大线程数
//        executor.setMaxPoolSize(maxPoolSize);
//        //配置队列大小
//        executor.setQueueCapacity(queueCapacity);
//        //配置线程池中的线程的名称前缀
//        executor.setThreadNamePrefix(namePrefix);
//
//        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
//        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
//        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
//        //执行初始化
//        executor.initialize();
//        return executor;
//    }

    @Bean(name = "createPDFExecutor")
    public Executor createPDFExecutor() {
        //获取当前机器的核数
        int cpuNum = Runtime.getRuntime().availableProcessors();
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(cpuNum);
        //配置最大线程数
//        executor.setMaxPoolSize(cpuNum * 2);
        executor.setMaxPoolSize(cpuNum);
        //配置队列大小
        executor.setQueueCapacity(300);
        //线程存活时间
        executor.setKeepAliveSeconds(60);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("createPDFExecutor");
        // 拒绝策略  不是池中的线程中执行任务，而是 由调用线程（提交任务的线程）处理该任务
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //执行初始化
        executor.initialize();
        return executor;
    }
}
